<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<!-- 数据更新 视图也会更新 -->

<body>
    <div id="app">
        <div>{{ msg }}</div>
    </div>
    <script src="https://lf26-cdn-tos.bytecdntp.com/cdn/expire-1-M/vue/2.6.14/vue.min.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                msg: '嗨害嗨',
            }
        })
        Vue.config.devtools = true
    </script>
</body>

</html>